Elevator-controlling device



(No Model l2 Sheets-Sheet 1.

. H. ROWNTBEE; ELEVATOR CONTROLLING DEVICE.

No. 473,198. Patented Apr. 19,1892.

/ Bi l LE'FI EI (No Model.) f 28heets-Shet 2. H. ROWNTREE.

ELEVATOR CONTROLLING DEVICE.

No. 473,198. PatentedApr'. 19, 1892.

I E MW 9 J IlNrTEn STATES HAROLD ROIVNTREE, OF KANSAS CITY, MISSOURI, ASSIGNOR TO THE CRANE ELEVATOR COMPANY, OF CHICAGO, ILLINOIS.

ELEVATOR-CONTROLLI N G DEVIC E.

SPECIFICATION forming part of Letters Patent No. 473,198, dated April 19, 1892.

Application filed January 18, 1892. Serial No. 418,482. (No model.)

T all whom it may concern; upon each rod 2 and 3 is a pair of sheaves 9 Be it known that I, HAROLD ROWNTREE, a 10 and 11 12, respectively. (See Fig. 3.) Each citizen of the United States, residing at Kanpair of sheaves is connected by bars 13 and sas City, county of Jackson, and State of Mis- 14, upon which they are respectively mounted, 5 5 5 souri, have invented certain new and useful and said bars are connected by parallel arms Improvements in Devices for Controlling the 15 and 16, both of said arms being pivoted to Operation of Elevators, of which the followa bracket 17, carried upon the car. One of ing is a specification, reference being had to said arms is connected to a hand-lever 18, so the accompanying drawings. that by means of the latter the movement 0t 10 The object of my invention is to provide the pulleys 9 10 and 11 12 may be effected mechanism for moving positively the valve, through the link-work just described. switch, or other controlling device by which It is evident that the shifting of the handthe movement of the motor or engine actuatlever 18 to one side or the other of its central ing the elevator is governed, the amount of position will cause the rods 2 and 3 to ap- I5 movement imparted to said controlling deproach to or recede from each other, the

vice being absolutely under the control of the amount of said motion being precisely deoperator upon the car. I also provide means termined by the amount of movement given for rendering the operation of the mechanism to the hand-lever 18, and the amount of this certain under varying conditions of temperamovement will be independent of the posi- 7o .20 ture. The derangement of the action of the tion of the car. In order to permit the latmechanism through the settling of the builderal pressure of the rollers upon the rods 2 ing or swaying of the car or from wearing of and 3 to be effective in shifting them, the the parts is also guarded against. levers and links 4, 6, and 8 must be oblique,

In the drawings, Figure 1 is a vertical secas shown, and to secure the best action it is 2 5 tion of an elevator-car showing also the conpreferable that the arms or links 15 and 16 trol mechanism and enough of the devices should haveacorrespondingobliquity,though connected therewith to illustrate my inventhis is not absolutely necessary. In fact itis tion. Fig. 2 is a separate view of a part of not absolutely necessary to employ the linkthe control mechanism. Fig. 3 shows a porwork shown for connecting the lever 18 and 0 tion of a car in section and a part of the conthe pulleys 9 10 and 11 12 at all, as equivalent trol mechanism connected therewith. Fig. 4. devices for accomplishing the same purpose is a view of the same parts, taken from a plane namely, the simultaneous and opposite moveat right angles to that of Fig. 3; and Fig. 5 ment oftwo pairs of pulleys-can be employed illustrates in detail the construction of the without departing frommyinvention. 35 shifting-pulleys. The lateral movement of the rods 2 and 3 2 3 are parallel rods hung vertically in the imparts movement to the controlling device, elevator-well from the opposite ends of the whatever itmaybe, throughthedevicesshown lever 4, which is pivoted at a point intermeat the lower part of Fig. 1. diate from its ends to a support 5 at the top The lever 19, working upon a fixed pivot, 40 of the elevator-well. The lower ends of the is arranged parallelto the lever 6, and parrods 2 3 are connected by a lever 6, which is allel rods 20 21 connect the ends of lever 6 to parallel to and in other respects like the lethe corresponding ends of lever 19. The'four ver 4 at the top. From the pivot of the lever points of attachment thus form a parallelo- 6 is suspended a weight 7, which is thus congram. This arrangement permits the rods 2 45 nected to the rods 2 and 3 through the lever and 3 to expand and contract under variations and serves to keep them in tension and so of temperature without affecting the lever 19, prevents their buckling. and it also compensates for any inaccuracy At suitable intervals throughout the length in the vertical height of the rods 2 and 3, of the rods 2' and 3 are pivoted links88,which whether such inaccuracy is in the original o serve to maintain the parallelism of the rods workmanship or results from the settling of 2 and 3 throughout their length. Running the building; but any lateral movement imparted to the rods, causing them to approach to or recede from each other, willmove the lever 6 and will impart a like movement to the lever 19. The latter is connected in any convenient manner, as by a link 22, to the valverod 23, which controls the controlling device.

In the drawings only a portion of the controlling device is shown, as this forms no part of the present invention, and it may be of any desired sort.

In order to secure greater ease of working, the pivots which sustain. the rods 2 and 3 and the weight '7 may be provided with anti-friction devices, one of said devices consistingot the reduction of the pivot to a knife-edge, such as are used on scales, as shown at 6 upon the lever 6, Fig 2.

If the car should not be a close fit upon the guides, the control-gear will not be effected thereby, as the movements of the controllingvalve depend wholly upon the relative position of the rods 2 and 3, and such position would not be altected by the swaying of the car, which would be occasioned by looseness of the guides.

In order to secure the noiseless working of the pulleys 9 10 and 11 12 upon their respective rods, I have devised the construction shown in Fig. 5. As there shown, the pulley is built up of a number of sections, the main body consisting of a sleeve a, havingaiiange b, to the face of which are bolted the SGVQIZLl rings which form the bearing-surface of the pulley. c c are two rings of rawhide, leather, or similar substance, and (Z is a ring, of slightly less diameter, of the same material, interposed between the two rings 0 c, a groove being thus formed in which the rod 2 or 3 may run. An outer ring a of metal, held by bolts f, clamps all the rings uponthe flange b.

It is to be understood that modifications may bemade in the details of the mechanism herein described without departing from the spirit of my invention.

Without confining myself to the precise details of construction herein shown and described, I claim- 1. The combination, in an elevator-control apparatus, of parallel rods suspended in the elevator-well and connected by links, devices upon the car engaging with said parallel rods and adapted to increase or diminish the distance between said rods, a controlling device governing the movement of the motor or engine, and connections between said controlling device and said rods, substantially as described.

2. The combination, in an elevator-control apparatus, of parallel rods suspended in the well, links connecting said rods, a pair of sheaves running upon each of said rods and connected by link-work to a lever upon the ear and adapted to increase or diminish the distance between said rods, a controlling device governing the movement of the engine or motor, and connections from said rod to said operating device, substantially as described.

3. The combination of a pair of vertical rods suspended from a lever at the top of the elevator-well and connected at their lower ends by a corresponding lever,a weight connected to said rods and serving to keep them in tension, devices upon the car by which the dis tance between said rods may be increased or diminished, a controlling device by which the movement of the motor or engine is governed, and connections from said rods to said controlling device, substantially as described.

4. The combination, in an elevat0r-operat ing apparatus, of a pair of vertical rods suspended from a lever at the top of the elevatorwell and connected at their lower ends by a corresponding lever, devices upon the car by which the distance between said rods may be increased or diminished, a controlling device by which the movement of'the motor or engine is governed, connections from said vertical rods to said controlling device, said connections consisting of a lever having a fixed pivot. and connected to said operating divice, and parallel rods connected to the opposite ends of said lever and tosaid vertical rods, so that the four points of connection form a parallelogram, substantially described.

5. The combination, in an elevator-control apparatus, of parallel rods suspended in the elevator-Well, a controlling device governing the movement of the engine or motor, connections between said rods and said controlling device, and an operating device upon the car adapted to increase or diminish the distance between said rods, said device consisting of a pair of sheaves running upon each rod, a bar connecting each pair of sheaves and arms connecting said bars, said bars and arms forming a parallelogram, and a hand-lever connected to one of said arms, substantially as described.

6. The combination, in an elevator-operating apparatus, of a pair of vertical rods suspended from a lever at the top of the elevatorwell and connected at their lower ends by a corresponding lever, a weight connected to said rods and serving to keep them in tension, devices upon the car by which the distance between said rods may be increased or diminished, a controlling device by which the movement of the motor or engine is governed, connections from said rods to said controlling device, said connections consisting of a lever having a fixed pivot and connected to said controlling device, and parallel rods con neetcd to the opposite ends of said lever and to said rods, so that the four points of connection form a parallelogram, substantially as described.

IIAROLD RO\VNTREE.

Witnesses:

WIL'FRID Rown'rnnn, JAMES C. iIon'roN.

IIO 

